en 
Colour of the 
Continuous 
‘Spectrum at 
_ the Place. 
i eh 
— 
sn TI A OS 
| 
THE SOLAR SPECTRUM AT THE DATE 1877-1878. 
Object Observed, generally a black, fixed 
Fraunhofer Line. 
Fine line, 
Do. : 
Very fine line, . 
Fine line, 
Strong and sharp double line— 
1st component, 
2nd 0. 
Fine line, 
Strong line, 
Do. 0 
Very fine line, . 
Fine line, 
Do. 
Very strong double : 1st component, 
2nd do. 
Clear double line : 1st coupanent, 
0. 
Wide double line : 1st component, 
2nd do. 
Intensity 
of black, or 
thickness 
of line. 
an wv 
Appear- 
ance by 
graphical 
compara- 
tive 
symbol. 
nae 
in| 
Ally 
ria 
Micrometer 
Reading. 
Rey. 
9°993 
10°060 
10°104 
10°167 
10°183 
10°242 
10°357 
10°388 
10°535 
10°545 
10°646 
10°678 
10°738 
10°72 
10°835 
10°855 
10°913 
10°946 
10h. 80m. A.M., white cirri and cirrostrati cover all the sky. 
Band of fine lines: 1st component, 
(Not in Angstrom), 2nd do. 
8rd_—s do. 
4th do. 
Strong sharp line, 
Dow eido; 
Do. do. 
Fine line, 
Hazy fine line, 
Strong line (not in Angstrom ; pro- 
bably by error of engraving), 
Very strong double line— 
1st component, 
2nd do. 
Fine line, 
do. ; 
| Very fine line, . 
Fine line, 
0. 
Sharp line, 
Fine line, 
Do. “ 
Very fine line, . 
- Strong line, 
Haze begins, . 
The Great F line: Ist side, 
do. 
Its haze ends, . . 
Sharp and black a ; 
Faint haze, 0 ° j . 
Hazy line, 3 
Hazy group : 1st component, 
2nd and chief compt. 
3rd component, 
He et 
el el SC) bo bp 
ore oo oo bo 
Or 
= 
n 
ae 
HwWHHow SCOO0 NnoHrHHEHy 
HN 
itd 
| 
\ 
5 
TLL 
10°965 
10°978 
10°990 
11-004 
11:°060 
11117 
11288 
11'357 
11°382 
11°398 
11°425 
11°498 
11°554 
11590 
11°610 
11°640 
11°667 
11-720 
11°738 
11°796 
11°825 
11°860 
11°876 
11°905 
11/977 
11:990 
12:010 
12°082 
12 064 
12°095 
12°160 
12°216 
12°240 
12°267 
PLACE- 
DATA, |Chemical-origin- 
from data from 
Angstrom’s Angstrom, 
Grating Nor-| Thalen, &c. 
mal Solar 
Spectrum. 
Tron 
2 
Iron. 
Barium. 
51'982 Tron. 
51°940 Tron. 
2 
Tron. 
Tron. 
Tron. 
| 
Titanium. | 
62-021 | Iron. 
52°075 Calcium. 
Nickel. 
52°140 Tron. 
52°148 Tron. 
Cobalt. 
Nickel. 
Tron. 
52254 |HyprocEen 
52°265 Tron. 
52°312 Nickel. 
315 
Concluded 
WAVE- 
NUMBER- 
PLACE, per 
British Inch, 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
51 
52 
52 
52 
740 
758 
769 
786 
793 
806 
835 
843 
881 
883 
908 
917 
932 
940 
957 
962 
978 
985 
990 
994 
997 
001 
015 
030 
075 
093 
098 
102 
109 
127 
141 
149 
155 
163 
170 
183 
187 
203 
211 
220 
224 
232 
248 
260 
267 
274 
292 
306 
312 
319 
Breadths & 
Doubles. 
13 
Oo 
15 
i) 
Differences. 
Distances. 
a 
- 00 
14 
45 
ra 
“IH ©1 00 
18 
14 
“I00 O& 
